Ugh I feel this man.
I confessed to them right as they were starting a burgeoning relationship with someone else.
"If I had known sooner maybe I'd feel different"
Which maybe they just were trying to be nice but goddamn did that feel like a stab in the gut. Especially since it acknowledged the fact that we had/have really good chemistry.
Anyway, I've gotten over it now (mostly) and we still talk and hang out. Pursueing other romantic interests so your thoughts don't dwell on them can good for you I think.
I struggled for about a 2 weeks after really bad.